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Multi-level homogenization for the prediction of the mechanical properties of ultra-high-performance concrete
Highlights A multi-level micromechanics based homogenization scheme is developed. A combined Molecular dynamics simulation and micromechanics models were adopted. Effects of fiber type, geometry, orientation and interface are parametrically studied. Compressive strength test, MIP and SEM analysis were conducted. Model input parameters were obtained from literature and the experimental program.
Abstract Ultra-high-performance concrete (UHPC), a multi-level cementitious composite that has properties influenced by constituents existing at different length scales, requires the combination of different modeling strategies to capture and understand its effective property. A multi-level (six levels) micromechanics-based homogenization is proposed to investigate the elastic mechanical properties of UHPC. Molecular dynamics and micromechanical theories based on Eshelby’s inclusion model are adopted to investigate the effects of the properties of the various constituents, such as the fiber type, volume fraction, orientation, geometry, including the size and volume fraction of coarse aggregates on the elastic mechanical properties of UHPC. Experimental investigations incorporating a compressive strength test, scanning electron microscopy, and mercury intrusion porosimetry tests were conducted to validate the model. The proposed multi-level homogenization scheme is able to quantitatively prove the importance of each constituent and provide a modeling tool capable of facilitating a thorough investigation of the mechanical properties of UHPC.
Multi-level homogenization for the prediction of the mechanical properties of ultra-high-performance concrete
Highlights A multi-level micromechanics based homogenization scheme is developed. A combined Molecular dynamics simulation and micromechanics models were adopted. Effects of fiber type, geometry, orientation and interface are parametrically studied. Compressive strength test, MIP and SEM analysis were conducted. Model input parameters were obtained from literature and the experimental program.
Abstract Ultra-high-performance concrete (UHPC), a multi-level cementitious composite that has properties influenced by constituents existing at different length scales, requires the combination of different modeling strategies to capture and understand its effective property. A multi-level (six levels) micromechanics-based homogenization is proposed to investigate the elastic mechanical properties of UHPC. Molecular dynamics and micromechanical theories based on Eshelby’s inclusion model are adopted to investigate the effects of the properties of the various constituents, such as the fiber type, volume fraction, orientation, geometry, including the size and volume fraction of coarse aggregates on the elastic mechanical properties of UHPC. Experimental investigations incorporating a compressive strength test, scanning electron microscopy, and mercury intrusion porosimetry tests were conducted to validate the model. The proposed multi-level homogenization scheme is able to quantitatively prove the importance of each constituent and provide a modeling tool capable of facilitating a thorough investigation of the mechanical properties of UHPC.
Multi-level homogenization for the prediction of the mechanical properties of ultra-high-performance concrete
Haile, Bezawit F. (author) / Jin, D.W. (author) / Yang, Beomjoo (author) / Park, Solmoi (author) / Lee, H.K. (author)
2019-08-23
Article (Journal)
Electronic Resource
English
Micromechanical Homogenization of Ultra-High Performance Concrete
| Trans Tech Publications | 2016
METHOD OF HOMOGENIZATION OF HIGH-PERFORMANCE OR ULTRA-HIGH-PERFORMANCE CONCRETE
| European Patent Office | 2019